Definition of Morris tube in English:

Morris tube

noun

historical
  • A small-bore rifle barrel that can be inserted in a large-bore rifle or shotgun for shooting practice.

Origin

Late 19th century; earliest use found in Army General Orders. From the name of Richard Morris (d. 1891), the inventor, who patented the barrel in 1881 + tube.

Pronunciation

Morris tube

/ˈmɒrɪs tjuːb//ˈmɒrɪs tʃuːb/